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less: handle yet another Home/End key sequence; expand a comment

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This commit is contained in:
Denis Vlasenko 2007-03-09 08:55:23 +00:00
parent e11b4a4705
commit f5a157615d
1 changed files with 13 additions and 4 deletions
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17
miscutils/less.c
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@ -48,8 +48,10 @@ enum {
REAL_KEY_LEFT = 'D',
REAL_PAGE_UP = '5',
REAL_PAGE_DOWN = '6',
REAL_KEY_HOME = '7',
REAL_KEY_HOME = '7', // vt100? linux vt? or what?
REAL_KEY_END = '8',
REAL_KEY_HOME_ALT = '1', // ESC [1~ (vt100? linux vt? or what?)
REAL_KEY_END_ALT = '4', // ESC [4~
REAL_KEY_HOME_XTERM = 'H',
REAL_KEY_END_XTERM = 'F',
@ -213,9 +215,12 @@ static void read_lines(void)
if (errno == EAGAIN && !yielded) {
/* We can hit EAGAIN while searching for regexp match.
* Yield is not 100% reliable solution in general,
* but for less it should be good enough.
* We give stdin supplier some CPU time to produce more.
* We do it just once. */
* but for less it should be good enough -
* we give stdin supplier some CPU time to produce
* more input. We do it just once.
* Currently, we do not stop when we found the Nth
* occurrence we were looking for. We read till end
* (or double EAGAIN). TODO? */
sched_yield();
yielded = 1;
goto read_again;
@ -638,8 +643,12 @@ static int less_getch(void)
return 24 + i;
if (input[2] == REAL_KEY_HOME_XTERM)
return KEY_HOME;
if (input[2] == REAL_KEY_HOME_ALT)
return KEY_HOME;
if (input[2] == REAL_KEY_END_XTERM)
return KEY_END;
if (input[2] == REAL_KEY_END_ALT)
return KEY_END;
return 0;
}
/* Reject almost all control chars */